Re: No 8 gel filter

Jeff Dilcher wrote:

> Any filter should require some adjustment, but a number 8 is
> not very dark. I usually take my reading through the filter,
> but I can't remember the adjustment. Maybe 1/3 or 2/3 stop
> additional?
>

If I'm not mistaken a number 8 (yellow B&W filter?) is one stop compensation.

>
> On a related note, I just finished shooting about 20
> pictures in a 4x5 pinhole with a gel filter behind the pinhole.
> Some shots had alot of "clear" dots in the negative- I am assuming
> that some micro dust particles on the filter were projected on
> the negative. Anyone else battle this?
>

 I use gel filters behind the pinhole on my Zero 2000 all the time. I tape
them into place with black paper tape. You almost always need at least an ND
(neutral density) filter if you are going to be taking any photos in bright
sunlight. Its almost too fast for a pinhole camera if that makes any sense. I
haven't come across shadows cast by the gels yet but it is a potential
problem. In most cases I use the gel once (one roll of film) then throw it
way. I can get away with taking a Lee or Kodak 3x3 gel and cutting it into 4
pieces. Gels can be problematic in that they seem to attract dust and you can't
clean the things. If the dust doesn't blow off you are stuck. Any attempts to
clean them just leaves more marks. Also, any pin pricks or divots etc. on the
surface of the gel will in theory affect the image through refraction, not that
this should be a concern with pinhole. So in answer to your question, no not
yet, but I'm aware the potential is there.

--Mark
Received on Tue Jun 18 21:18:01 2002